Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f292c94e3594e6f…

MALICIOUS

PDF

47.3 KB Created: 2021-05-19 16:32:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b146f73bfc90ec77aee9d47bbea48273 SHA-1: 96f62e5e9d777e99a41b9a7151d674f58d537811 SHA-256: 4f292c94e3594e6fee5f1f6ed511aa94bcab8d6beaa0d0535ed4575d0a6b86cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as offers for free game currency or hacks. The document body and embedded links suggest a lure to a website that likely hosts further malicious content or exploits. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-offers-game-hack In PDF document text
    • http://drentklubben.se/images/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/robux-gratis_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://drentklubben.se/images/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3B 25692 bytes
SHA-256: fab1215fb4cd64bc9f0680c2cead4072f9b90943fa2e63bc61958439e365433d
font_01_sfnt_off0000885d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885D 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9504 18768 bytes
SHA-256: 90722031df8f7e72138583497ea9de630fa8b2a13d2a01041543da505e8107b2

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